Ask which cooking oil is healthiest and you will get an answer built almost entirely on one number: smoke point. It is the number printed on the shelf-talker, quoted in the video, repeated in the comments. It is also, on its own, close to useless.
We press oil for a living. Here is how the people who actually make it think about the question — and why the honest answer has less to do with the category on the label than with the bottle you happen to pick up.
What “healthy” means in a cooking oil
Three things decide it. Smoke point is not one of them, though it is downstream of the second.
1. The fat itself
Every oil is a particular mix of saturated, monounsaturated and polyunsaturated fatty acids, and that mix is largely fixed by the plant. Extra virgin olive oil is dominated by oleic acid, a monounsaturated fat that typically makes up somewhere around three-quarters of the oil. Monounsaturated fats are chemically stable — one double bond, not several — and decades of dietary research have consistently associated them with favourable effects on blood lipids when they displace saturated fat. In 2018 the U.S. Food and Drug Administration permitted a qualified health claim for oils high in oleic acid, tied to roughly one and a half tablespoons a day in place of fats higher in saturated fat.
Polyunsaturated oils sit at the other end. They are not villains — the body requires some polyunsaturated fat — but chemically they are fragile. More double bonds means more places for oxygen and heat to attack.
2. How it behaves when it gets hot
This is where smoke point misleads people. Smoke point is the temperature at which an oil begins to visibly smoke, and it is driven mostly by free fatty acid content and residual impurities. Refining strips those out, which raises the smoke point — but refining also strips out the antioxidants that protect the oil from oxidising in the first place. So a heavily refined oil can post an impressive number on the label and still degrade faster in the pan than a good extra virgin.
Laboratory work on heated oils has made this point repeatedly: when researchers measure what actually forms in the oil under cooking conditions — polar compounds, oxidation by-products — extra virgin olive oil performs better than its modest smoke point would predict, and better than several oils with far higher ones. Oxidative stability, not smoke point, is the number that matters. We wrote at more length about this in cooking with extra virgin olive oil and the smoke point myth.
3. What else is in the bottle
This is the part that gets lost entirely in category-versus-category arguments. A genuine extra virgin olive oil is not just fat. It carries biophenols — oleocanthal, oleacein, hydroxytyrosol and their relatives — that come from the fruit and survive only if the olives were healthy, milled quickly and pressed without heat. The European Union permits a health claim for olive oil polyphenols protecting blood lipids from oxidative damage, set at a specific minimum concentration, precisely because the compounds are measurable and the effect is dose-dependent.
Refined oils have essentially none of this. Neither does an extra virgin that has been sitting warm and lit on a shelf for two years. Polyphenols are the reason good oil catches at the back of your throat — and the reason two bottles wearing the same three words can be nutritionally quite different products.
How the usual contenders actually compare
Extra virgin olive oil is the only widely available cooking fat that scores well on all three: high monounsaturated content, strong oxidative stability, and a meaningful load of antioxidants. It is also the fat at the centre of the dietary pattern with the deepest long-term evidence base behind it, which is not a coincidence — see what the science actually says about olive oil and health.
Refined, “light” and pomace olive oils keep most of the oleic acid and lose almost all of the rest. They are not harmful. They are simply a different, lesser product wearing a familiar name, and they should be priced accordingly.
Avocado oil is genuinely close to olive oil on fatty acid profile. Its weakness is not chemistry but supply: independent testing of retail avocado oil has repeatedly found samples that were rancid or adulterated, and the category has no equivalent of olive oil’s grade standards and sensory panels.
Seed and vegetable oils — canola, sunflower, soybean, corn, grapeseed — are cheap, neutral and high in polyunsaturated fat. The internet’s claim that they are uniquely toxic outruns the evidence. But they are also stripped, deodorised commodity products with nothing in them beyond fat, and they oxidise readily. Neutral is exactly what they are.
Coconut oil and butter are high in saturated fat. Both are perfectly good in the dishes that want their flavour. Neither is a sensible default for everyday cooking.
The part almost nobody says out loud
Choosing the right category and then buying a bad example of it gains you nothing. An analysis by the UC Davis Olive Center of imported oils sold in California found that the majority of the “extra virgin” samples tested failed the international sensory standards for that grade. Not poison — just old, badly made, or blended oil sold as something better.
So the real answer to “what is the healthiest oil to cook with” is narrower than the question: a fresh, properly made extra virgin olive oil with a harvest date on it, from a source you can name. That is a different purchase from a generic bottle marked only “Product of Italy.” Here is how quality is actually measured.
How to use it
Cook with it. Sauté, roast, even shallow-fry — the fear of heating good olive oil is unfounded, and the flavour it gives back is the point. Keep a second bottle uncooked for finishing, where the polyphenols and aromatics arrive intact. Store both away from heat and light, and buy in a size you will finish within a few months.
Our oil comes from one family’s groves in San Procopio, Calabria, pressed within hours of picking and dated by harvest, not by “best before.” See the range — and taste the difference the third factor makes.
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